The thermal stability and related properties of iron-base glasses

Abstract

The crystallization temperature of Fe 80− X M X P 13C 7 and Fe 80− X N X P 13C 7 alloys has been investigated, where M is Zr, Nb, Mo, Ru, Rh or Pd, and N is B, C, Si, P, As, Sn or Sb. Zr and Mo effectively increase T X and Pd decreases it. The increase in crystallization temperature T X with the concentration of elements M, is larger for the second group of periodic elements, except for the case of Pd, compared with the first group of periodic elements. The crystallization temperature is related to the average electron concentration, the atomic size and the atomic cohesive energy of the additive metal. The metalloidal elements N, except for Sn and Sb, increase the T X of Fe 80− X N X P 13C 7 alloys. In particular, the addition of B, C, Si of P definitely increases T X and small amounts of Sn or Sb markedly decrease it. Contrary to the effects of metallic elements, the effects of metalloidal elements do not show the general trend. However, in the same group of the periodic system T X decrease with increasing the atomic size and decreasing cohesive energies for metalloidal elements.